Riverdale's coolpower is marketed by lesco as (3way ester). Millineum has dicamba and Momentum has triclopyr. Check the lable and you will see Lesco's Momentum uses a cleaner and higher grade of 2-4-d than Millineum.

I have been using horse power ( amine) and cool power
(ester) for a couple of years now and they both work very well for me. As i have started my early spring apps i see no weed activity left over from last year. Horse power has a faint odor and the cool power has a stronger odor of kerosene but not bad. If you want to rid your use of 2,4-D these products are tops on my list and will not change any time soon.